Review BARPA-R global attributes

This issue is to track the review of the global attributes of the BARPA-R post-processed files.

The global attributes used in BARPA-R are:

| **key** = | [*restriction*:] { item1, item2 ... } |
| ------------ | ------------ |
| **axiom_version** | { 0.1.0 } |
| **axiom_schemas_version** | { 0.1.0 } |
| **axiom_schema** | { cordex-15T.json, cordex-1H.json, cordex-6H.json, cordex-1H.json, cordex-1D.json, cordex-1M.json } |
| **productive_version** | { v1 } |
| **Conventions** | { [CF-1.9](https://cfconventions.org/Data/cf-standard-names/77/build/cf-standard-name-table.html), [ACDD-1.3](https://wiki.esipfed.org/Attribute_Convention_for_Data_Discovery_1-3) } |
| **title** | { Bureau of Meteorology Atmospheric Regional Projections for Australia (BARPA) } |
| **source** | { Data from Met Office Unified Model } |
| **project** | { CORDEX-CMIP6 } |
| **program** | { Australian Climate Service (ACS) } |
| **summary** | { "The Bureau of Meteorology Atmospheric Regional Projections for Australia (BARPA) delivers high-resolution dynamical downscaling of CMIP experiments over CORDEX-Australasia and Australian domains." } |
| **naming_authority** | { "Australian Bureau of Meteorology" } |
| **publisher_type** | { group } |
| **publisher_institution** | { "Australian Bureau of Meteorology" } |
| **publisher_name** | { "Australian Bureau of Meteorology" } |
| **publisher_url** | { http://www.bom.gov.au } |
| **creator_type** | { institution } |
| **creator_institution** | { "Australian Bureau of Meteorology" } |
| **processing_level** | { "Level 1: Post-processing of Level 0b data with Controlled Vocabulary (CV) & Data Reference System (DRS) applied" } |
| **ensemble** | { r?i?p?f? (e.g. r6i1p1f1) } |
| **rcm_version_id** | { v1 } |
| **rcm_version** | { 11.9 } |
| **rcm_version_cordex** | { v1 } |
| **rcm_institute** | { BOM } |
| **rcm_model** | { BARPA-R } |
| **rcm_model_cordex** | { BARPA-R } |
| **institute_id** | { BOM } |
| **institution** | { Bureau of Meteorology } |
| **model_id** | { BOM-BARPA-R } |
| **experiment** | { Description of the experiment (e.g., Evaluation run using ECMWF-ERA5 reanalysis. Forcing mode: nudged atmosphere) } |
| **experiment_id** | { *CMIP6*: { historical, ssp126, ssp245, ssp370, ssp585 }
*ERA5*: { evaluation } } |
| **driving_model_id** | { refer to [CMIP6 CV](https://github.com/WCRP-CMIP/CMIP6_CVs/blob/master/CMIP6_source_id.json); format=institution_id-source_id (e.g. CSIRO-ARCCS-ACCESS-CM2) } |
| **driving_model_ensemble_member** | { r?i?p?f? (e.g. r6i1p1f1) } |
| **driving_experiment_name** | { *CMIP6*: { historical, ssp126, ssp245, ssp370, ssp585 }
*ERA5*: { evaluation } } |
| **driving_experiment** | { *CMIP6*: { historical, ssp126, ssp245, ssp370, ssp585 }
*ERA5*: { evaluation } } |
| **project_id** | { CORDEX-CMIP6 } |
| **CORDEX_domain** | { *AUS-???*: refer to https://cordex.org/domains/region-9-australasia/ (e.g., AUS-20i) } |
| **geospatial_lat_min** | { minimum latitude in file } |
| **geospatial_lat_max** | { maximum latitude in file } |
| **geospatial_lon_min** | { minimum longitude in file } |
| **geospatial_lon_max** | { maximum longitude in file } |
| **time_coverage_start** | { Start time in file } |
| **time_coverage_end** | { End time in file } |
| **time_coverage_duration** | { *PT???D*: Time duration in file (e.g., PT365D) } |
| **time_coverage_resolution** | { *PT???H*: Time resolution in file (e.g., PT360M0S } |
| **standard_name_vocabulary** | { CF Standard Name Table v79 (refer to https://cfconventions.org/Data/cf-standard-names/current/build/cf-standard-name-table.html (last accessed 2 September 2022) } |
| **keywords** | { List of keywords describing the file content } |
| **keywords_vocabulary** | { GCMD Science Keywords, Version 13.6 } |
| **keywords_reference** | { https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords (last accessed 2 September 2022) } |
| **frequency** | { 15min, 1hr, 6hr, day, mon } |
| **tracking_id** | { unique tracking id number } |
| **date_created** | { Creation date } |
| **date_modified** | { Modification date } |
| **date_metadata_modified** | { Metadata modification date } |
| **history** | { File history } |
| **activity** | { CORDEX-CMIP6 } |
| **product** | { output, bias-adjusted-output, indices, bias-adjusted-indices } |
| **domain** | { AUS-15, AUS-20i } |
| **frequency-or-category** | *output, bias-corrected-output*: { mon day 6hr 1hr 15min }
*indices, bias-corrected-indices*: { climdex gev fire heat coasts trop-cyclones ... } |
| **license** | { CC-BY v4.0 } |

Are there any issues with using these global attributes?